Tread surface and periphery of a footwear unit sole



FIG. 1 is a plan view of a tread surface and periphery of a footwear unit sole showing our new design;

FIG. 2 is an elevational view of one side thereof;

FIG. 3 is an elevational view of the opposite side thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a sectional view on an enlarged scale taken along line 6--6 of FIG. 1;

FIG. 7 is a sectional view on an enlarged scale taken along line 7--7 of FIG. 1; and,

FIG. 8 is a sectional view on an enlarged scale taken along line 8--8 of FIG. 1. 

The ornamental design for a tread surface and periphery of a footwear unit sole, as shown and described. 